General Pro Package 215
Table 15-3. Doppler mode measurements in the General Pro Package.
Doppler Spectra
Most vascular calculations involve making measurements on a Doppler (FFT)
spectrum.
You can fit a curve to the spectrum either automatically or manually and then make
measurements on the curve. Two curve types are generally used:
Table 15-4. Two types of Doppler curves.
A/B
(Systolic velocity)/
(Diastolic velocity)
PS/ED (Measure PS, then ED)
B/A
(Diastolic velocity)/
(Systolic velocity)
ED/PS (Measure PS, then ED)
PS/ED
(Peak Systolic Velocity)/
(End Diastolic Velocity)
PS/ED (Measure PS, then ED)
Stenosis
ST Dist 1
Transverse diameter of the
vessel lumen before the
stenosis.
Distance
ST Dist 2
Transverse diameter of the
lumen at the stenotic part of
the vessel.When you
measure this after measuring
ST Dist 1, % stenosis is
calculated (formula on
page 259).
Distance
ST Area 1
Area of vessel lumen before
the stenosis. Used to
calculate % stenosis.
Ellipse or freehand.
ST Area 2
Area of residual lumen of
vessel used to calculate
stenosis. When you measure
this after measuring ST Area
1, % stenosis is calculated
(formula on page 259).
Ellipse or freehand
Measurement
Results
Measuring Tool
This type of curve
is a trace of...
Peak (Max)
maximum points of the spectrum (those farthest from the
baseline)
Mean
mean points of the spectrum
Содержание Pro Focus 2202
Страница 1: ...English BB1279 A June 2005 Pro Focus 2202 Extended User Guide ...
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Страница 15: ...Part 1 Basics ...
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Страница 49: ...Part 2 Working with the Image ...
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Страница 209: ...Part 5 Pro Packages ...
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